<template>
  <div :class="className" :style="{height:height,width:width}"></div>
</template>

<script>
  import echarts from 'echarts'
  require('echarts/theme/macarons') // echarts theme
  import { debounce } from '@/utils'
  import { placeUsageRate } from '../../../../api/dashboard/placeUsageRate'
  import '../../../../utils/getTime'

  export default {
    props: {
      className: {
        type: String,
        default: 'chart'
      },
      width: {
        type: String,
        default: '100%'
      },
      height: {
        type: String,
        default: '350px'
      },
      autoResize: {
        type: Boolean,
        default: true
      },
      chartData: {
        type: Object
      }
    },
    data() {
      return {
        chart: null
      }
    },
    mounted() {
      var arrTime = []
      var arrValue = []
      for (var i = 0; i < 5 ; i++) {
        const time = new Date().format('yyyy-MM-dd hh:mm:ss', i)
        placeUsageRate(time).then(response => {
          arrValue.push(response)
        })
        arrTime.push(time)
      }
      arrValue.reverse()
      arrTime.reverse()
      this.initChart(arrTime, arrValue)
      if (this.autoResize) {
        this.__resizeHanlder = debounce(() => {
          if (this.chart) {
            this.chart.resize()
          }
        }, 100)
        window.addEventListener('resize', this.__resizeHanlder)
      }
      // 监听侧边栏的变化
      const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
      sidebarElm.addEventListener('transitionend', this.__resizeHanlder)
    },
    beforeDestroy() {
      if (!this.chart) {
        return
      }
      if (this.autoResize) {
        window.removeEventListener('resize', this.__resizeHanlder)
      }

      const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
      sidebarElm.removeEventListener('transitionend', this.__resizeHanlder)

      this.chart.dispose()
      this.chart = null
    },
    watch: {
    },
    methods: {
      initChart(arrTime, arrValue) {
        console.log(arrTime)
        console.log(arrValue)
        this.chart = echarts.init(this.$el, 'macarons')
        this.chart.setOption({
          xAxis: {
            data: arrTime,
            boundaryGap: false,
            axisTick: {
              show: false
            }
          },
          visualMap: {
            show: false,
            pieces: [{
              gt: 0,
              lte: 0.4,
              color: 'blue'
            }, {
              gt: 0.4,
              color: 'red'
            }],
            seriesIndex: 0
          },
          grid: {
            left: 10,
            right: 10,
            bottom: 20,
            top: 30,
            containLabel: true
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross'
            },
            padding: [5, 10]
          },
          yAxis: {
            axisTick: {
              show: false
            },
            axisLine: {
              lineStyle: {
                width: 3,
                color: {
                  type: 'linear',
                  x: 0,
                  y: 0,
                  x2: 0,
                  y2: 1,
                  colorStops: [{
                    offset: 0,
                    color: 'red'
                  }, {
                    offset: 1,
                    color: 'blue'
                  }],
                  globalCoord: false // 缺省为 false
                }
              }
            }
          },
          series: [{
            name: '周转率',
            smooth: true,
            type: 'line',
            data: arrValue,
            animationDuration: 2800,
            animationEasing: 'cubicInOut',
            itemStyle: {
              normal: {
                color: 'rgb(103, 99, 99)',
                shadowBlur: 2,
                shadowColor: 'rgba(0, 0, 0, .12)',
                shadowOffsetX: 2,
                shadowOffsetY: 2
              }
            },
            lineStyle: {
              normal: {
                width: 3,
                shadowColor: 'rgba(0,0,0,0.4)',
                shadowBlur: 10,
                shadowOffsetX: 4,
                shadowOffsetY: 10
              }
            },
            markLine: {
              silent: true,
              data: [{
                yAxis: 0.4
              }]
            }
          }]
        })
      }
    }
  }
</script>
